21305414541 has 8 divisors (see below), whose sum is σ = 28454488384. Its totient is φ = 14179975200.

The previous prime is 21305414527. The next prime is 21305414569. The reversal of 21305414541 is 14541450312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21305414541 - 2²³ = 21297025933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21305414499 and 21305414508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21305415541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5906521 + ... + 5910126.

It is an arithmetic number, because the mean of its divisors is an integer number (3556811048).

Almost surely, 2^21305414541 is an apocalyptic number.

It is an amenable number.

21305414541 is a deficient number, since it is larger than the sum of its proper divisors (7149073843).

21305414541 is a wasteful number, since it uses less digits than its factorization.

21305414541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11817251.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21305414541 its reverse (14541450312), we get a palindrome (35846864853).

The spelling of 21305414541 in words is "twenty-one billion, three hundred five million, four hundred fourteen thousand, five hundred forty-one".